Light-extraction member, organic el element, and method for producing the organic el element

Abstract

A light-extraction member for use in a light-emitting display device, the light-extraction member including a light-extracting substrate which is disposed on the light-extraction side of the light-emitting display device, a color filter layer formed over the light-extracting substrate, and a lens member formed over the color filter layer, wherein the color filter layer is bonded via an adhesive portion to a convex top portion of the lens member.

What is claimed is: 
     
         1 . A light-extraction member for use in a light-emitting display device, the light-extraction member comprising:
 a light-extracting substrate which is disposed on the light-extraction side of the light-emitting display device,   a color filter layer formed over the light-extracting substrate, and   a lens member formed over the color filter layer,   wherein the color filter layer is bonded via an adhesive portion to a convex top portion of the lens member.   
     
     
         2 . The light-extraction member according to  claim 1 , wherein a flat portion is present on the side of the lens member opposite to the light-extraction side thereof. 
     
     
         3 . The light-extraction member according to  claim 1 , wherein a space is present between the lens member and the color filter layer in a light-extracting direction. 
     
     
         4 . The light-extraction member according to  claim 1 , wherein the lens member has a refractive index of 1.4 to 2.1. 
     
     
         5 . The light-extraction member according to  claim 1 , wherein the lens member is a hemispherical lens. 
     
     
         6 . The light-extraction member according to  claim 1 , wherein the light-extracting substrate is made of a material having a water permeability of 0.1 g/m 2 /day or lower. 
     
     
         7 . The light-extraction member according to  claim 1 , wherein the light-extracting substrate is a barrier film composed of a plurality of layers. 
     
     
         8 . The light-extraction member according to  claim 1 , wherein the adhesive portion is the color filter layer. 
     
     
         9 . The light-extraction member according to  claim 1 , wherein the adhesive portion is a layer formed through coating of the same material as the lens member. 
     
     
         10 . An organic EL element comprising:
 a light-extraction member for use in a light-emitting display device,   wherein the light-extraction member comprises a light-extracting substrate which is disposed on the light-extraction side of the light-emitting display device, a color filter layer formed over the light-extracting substrate, and a lens member formed over the color filter layer, and   wherein the color filter layer is bonded via an adhesive portion to a convex top portion of the lens member.   
     
     
         11 . The organic EL element according to  claim 10 , wherein the color filter layer comprises a red filter portion, a green filter portion and a blue filter portion, which are located so that the red filter portion corresponds to an organic compound layer emitting red light, the green filter portion corresponds to an organic compound layer emitting green light, and the blue filter portion corresponds to an organic compound layer emitting blue light. 
     
     
         12 . The organic EL element according to  claim 10 , wherein a flat portion is present at the lens member on the side opposite to the light-extraction side. 
     
     
         13 . The organic EL element according to  claim 10 , wherein a space is present between the lens member and the color filter layer in a light-extracting direction. 
     
     
         14 . The organic EL element according to  claim 10 , wherein the lens member has a refractive index of 1.4 to 2.1. 
     
     
         15 . The organic EL element according to  claim 10 , wherein the light-extracting substrate is made of a material having a water permeability of 0.1 g/m 2 /day or lower. 
     
     
         16 . The organic EL element according to  claim 10 , wherein the adhesive portion is the color filter layer. 
     
     
         17 . A method for producing an organic EL element, the method comprising:
 forming a light-extraction member which comprises a light-extracting substrate, a color filter layer and a lens member,   forming a light-emitting portion which comprises at least a substrate, a pair of electrodes on the substrate, and a light-emitting layer between the electrodes, and   joining together the light-extraction member and the light-emitting portion.   
     
     
         18 . The method according to  claim 17 , wherein the forming the light-extraction member comprises forming the lens member on a temporary-bonding substrate, forming the color filter on the light-extracting substrate, bonding the color filter layer via an adhesive portion to a convex top portion of the lens member, and separating the temporary-bonding substrate from the lens member bonded to the color filter layer.